oseltamivir and its Impurities
An active metabolite of Oseltamivir, which an antiviral medication sold under the brand name of Tamiflu. It is used to treat and prevent influenza A and influenza B. It is a competitive inhibitor of influenza´s neuraminidase enzyme. Reference standards of Oseltamivir API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-(((2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-(((2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-enecarboxylate
Catalogue No.:PA 15 12620
CAS :
NA
Molecular Formula : C22H38N2O9
Molecular Weight : 474.55


(3aS,7aR)-Ethyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
(3aS,7aR)-Ethyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
Catalogue No.:PA 15 12710
CAS :
141781-67-1
Molecular Formula : C12H18O5
Molecular Weight : 242.27


(3aS,7S,7aR)-Methyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
(3aS,7S,7aR)-Methyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
Catalogue No.:PA 15 12720
CAS :
141781-67-1
Molecular Formula : C11H16O5
Molecular Weight : 228.24


(3aR,7S,7aS)-Ethyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
(3aR,7S,7aS)-Ethyl 7-hydroxy-2,2-dimethyl-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
Catalogue No.:PA 15 12730
CAS :
1446467-13-5
Molecular Formula : C12H18O5
Molecular Weight : 242.27


2-(2-(((1S,5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-en-1-yl)amino)-2oxoethyl)-2-hydroxysuccinic Acid
2-(2-(((1S,5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-en-1-yl)amino)-2oxoethyl)-2-hydroxysuccinic Acid
Catalogue No.:PA 15 12740
CAS :
2738248-86-5
Molecular Formula : C22H34N2O10
Molecular Weight : 486.51


3-(((1S,5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-en-1yl) carbamoyl)3-hydroxypentanedioic Acid
3-(((1S,5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-en-1yl) carbamoyl)3-hydroxypentanedioic Acid
Catalogue No.:PA 15 12750
CAS :
2738248-87-6
Molecular Formula : C22H34N2O10
Molecular Weight : 486.51


(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4R,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)amino)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4R,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)amino)cyclohex-1-enecarboxylate
Catalogue No.:PA 15 12770
CAS :
2413185-85-8
Molecular Formula : C22H38N2O9
Molecular Weight : 474.55


(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4S,5R)-2,3,4-trihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)methyl)amino)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4S,5R)-2,3,4-trihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)methyl)amino)cyclohex-1-enecarboxylate
Catalogue No.:PA 15 12780
CAS :
2413185-86-9
Molecular Formula : C22H38N2O9
Molecular Weight : 474.55


(3R,4R,5S)-Ethyl 4-acetamido-5-((Z)-((2S,3R,4R,5R)-2,3,4,5,6-pentahydroxyhexylidene)amino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-5-((Z)-((2S,3R,4R,5R)-2,3,4,5,6-pentahydroxyhexylidene)amino)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate
Catalogue No.:PA 15 12790
CAS :
NA
Molecular Formula : C22H38N2O9
Molecular Weight : 474.55


(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-(((3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-enecarboxylate
(3R,4R,5S)-Ethyl 4-acetamido-3-(pentan-3-yloxy)-5-(((3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-enecarboxylate
Catalogue No.:PA 15 12810
CAS :
NA
Molecular Formula : C22H38N2O9
Molecular Weight : 474.55


N-((1R,3S,4R,5R,11R,12S,13S,14R)-12,13,14-Trihydroxy-8-oxo-5-(pentan-3-yloxy)-9,15-dioxa-2-azatricyclo[9.3.1.13,7]hexadec-6-en-4-yl)acetamide
N-((1R,3S,4R,5R,11R,12S,13S,14R)-12,13,14-Trihydroxy-8-oxo-5-(pentan-3-yloxy)-9,15-dioxa-2-azatricyclo[9.3.1.13,7]hexadec-6-en-4-yl)acetamide
Catalogue No.:PA 15 12820
CAS :
NA
Molecular Formula : C20H32N2O8
Molecular Weight : 428.48


Ethyl (3S,4S,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3S,4S,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 12515
CAS :
NA
Molecular Formula : C26H44N2O4
Molecular Weight : 448.65


Ethyl (3R,4R,5S)-5-acetamido-4-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-5-acetamido-4-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 12555
CAS :
2254819-34-4
Molecular Formula : C22H36N2O4
Molecular Weight : 392.54


2-(2-((5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-enylamino)-2-oxoethyl)-2-hydroxysuccinic Acid
2-(2-((5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-enylamino)-2-oxoethyl)-2-hydroxysuccinic Acid
Catalogue No.:PA 15 12565
CAS :
NA
Molecular Formula : C22H34N2O10
Molecular Weight : 486.52


Ethyl (3aR,7R,7aR)-2,2-diethyl-7-((methylsulfonyl)oxy)-3a,4,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
Ethyl (3aR,7R,7aR)-2,2-diethyl-7-((methylsulfonyl)oxy)-3a,4,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate
Catalogue No.:PA 15 12615
CAS :
1642097-30-0
Molecular Formula : C15H24O7S
Molecular Weight : 348.41


(3R,4R,5R)-3-(1-Ethylpropoxy)-4-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester
(3R,4R,5R)-3-(1-Ethylpropoxy)-4-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester
Catalogue No.:PA 15 12880
CAS :
204254-92-2
Molecular Formula : C15H26O7S
Molecular Weight : 350.43


(3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester
(3R,4R,5R)-4-(1-Ethylpropoxy)-3-hydroxy-5-[(methylsulfonyl)oxy]-1-cyclohexene-1-carboxylic Acid Ethyl Ester
Catalogue No.:PA 15 12890
CAS :
204254-94-4
Molecular Formula : C15H26O7S
Molecular Weight : 350.43


Ethyl (3R,4S,5R)-5-(tert-butylamino)-4-hydroxy-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4S,5R)-5-(tert-butylamino)-4-hydroxy-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 12940
CAS :
651324-04-8
Molecular Formula : C18H33NO4
Molecular Weight : 327.47


Ethyl (1R,5R,6R)-7-(tert-butyl)-5-(pentan-3-yloxy)-7-azabicyclo[4.1.0]hept-3-ene-3-carboxylate
Ethyl (1R,5R,6R)-7-(tert-butyl)-5-(pentan-3-yloxy)-7-azabicyclo[4.1.0]hept-3-ene-3-carboxylate
Catalogue No.:PA 15 12950
CAS :
2417645-75-9
Molecular Formula : C18H31NO3
Molecular Weight : 309.45


Ethyl (3R,4R,5S)-4-(tert-butylamino)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-(tert-butylamino)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 12960
CAS :
651324-06-0
Molecular Formula : C24H42N2O3
Molecular Weight : 406.61


Ethyl (3R,4S,5R)-5-(N-(tert-butyl)acetamido)-4-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4S,5R)-5-(N-(tert-butyl)acetamido)-4-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 12970
CAS :
NA
Molecular Formula : C26H44N2O4
Molecular Weight : 448.65


Ethyl (3S,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3S,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 12980
CAS :
NA
Molecular Formula : C26H44N2O4
Molecular Weight : 448.65


Ethyl (3R,4S,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4S,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 12990
CAS :
2413185-98-3
Molecular Formula : C26H44N2O4
Molecular Weight : 448.65


Oseltamivir Related Compound A ((3S,4R,5S)-ethyl 4-acetamido-5-amino-2-azido-3-(pentan-3-yloxy)cycl (1479315)
Oseltamivir Related Compound A ((3S,4R,5S)-ethyl 4-acetamido-5-amino-2-azido-3-(pentan-3-yloxy)cycl (1479315)
Catalogue No.:PA USP1479315
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


Ethyl (3R,4R,5S)-4-acetamido-3-(pentan-3-yloxy)-5-(((3S,4R,5R)-3,4,5-trihydroxy-2-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-acetamido-3-(pentan-3-yloxy)-5-(((3S,4R,5R)-3,4,5-trihydroxy-2-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)amino)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 12645
CAS :
NA
Molecular Formula : C22H38N2O9
Molecular Weight : 474.55


Ethyl (3R,4R,5S)-4-acetamido-5-(((3S,4S,5R)-3,4-dihydroxy-2,5-bis(hydroxymethyl)tetrahydrofuran-2-yl)amino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-acetamido-5-(((3S,4S,5R)-3,4-dihydroxy-2,5-bis(hydroxymethyl)tetrahydrofuran-2-yl)amino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 12655
CAS :
NA
Molecular Formula : C22H38N2O9
Molecular Weight : 474.55


Ethyl (3R,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 0121003
CAS :
651324-07-1
Molecular Formula : C26H44N2O4
Molecular Weight : 448.65


Ethyl (3R,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate Hydrochloride
Ethyl (3R,4R,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate Hydrochloride
Catalogue No.:PA 15 0121004
CAS :
651324-08-2
Molecular Formula : C26H45ClN2O4
Molecular Weight : 485.11


Ethyl (3R,4R,5S)-4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4R,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)amino)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-acetamido-3-(pentan-3-yloxy)-5-((((3S,4R,5R)-2,3,4,5-tetrahydroxytetrahydro-2H-pyran-2-yl)methyl)amino)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 0521000
CAS :
2413185-85-8
Molecular Formula : C22H38N2O9
Molecular Weight : 474.55


Ethyl (3R,4S,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4S,5S)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 0521001
CAS :
2413185-97-2
Molecular Formula : C26H44N2O4
Molecular Weight : 448.65


Ethyl (3R,4R,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5R)-4-(N-(tert-butyl)acetamido)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 0521002
CAS :
2413185-96-1
Molecular Formula : C26H44N2O4
Molecular Weight : 448.65


2-(2-((5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-enylamino)-2-oxoethyl)-2-hydroxysuccinic Acid
2-(2-((5R,6R)-6-Acetamido-3-(ethoxycarbonyl)-5-(pentan-3-yloxy)cyclohex-3-enylamino)-2-oxoethyl)-2-hydroxysuccinic Acid
Catalogue No.:PA 15 0121005
CAS :
NA
Molecular Formula : C22H34N2O10
Molecular Weight : 486.52


Ethyl (3R,4R,5R)-5-chloro-4-((methylsulfonyl)oxy)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5R)-5-chloro-4-((methylsulfonyl)oxy)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 0521005
CAS :
NA
Molecular Formula : C15H25ClO6S
Molecular Weight : 368.87


Ethyl (3R,4R,5S)-4-(tert-butyl(nitroso)amino)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl (3R,4R,5S)-4-(tert-butyl(nitroso)amino)-5-(diallylamino)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 0521007
CAS :
NA
Molecular Formula : C24H41N3O4
Molecular Weight : 435.61


Ethyl 4-acetamido-5-(2-formyl-5-(hydroxymethyl)-1H-pyrrol-1-yl)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Ethyl 4-acetamido-5-(2-formyl-5-(hydroxymethyl)-1H-pyrrol-1-yl)-3-(pentan-3-yloxy)cyclohex-1-ene-1-carboxylate
Catalogue No.:PA 15 0521009
CAS :
NA
Molecular Formula : C22H32N2O6
Molecular Weight : 420.51